win32 with c# for serial data transferr

i have found out the hard way that the dot net framework does not have support for serial devices as of yet, and i need to take data in through a serial port ( my infared port). i have found that i will have to use the win32 api. can anyone tell me how to add this to my project, and what methods , functions i need from it to allow me to recieve data from a serial port?im using c#. thanks all